One firm push and the finger went in all the way, far easier than Lucas was expecting, and forcing a loud moan more feminine that he was expecting out of his mouth.
"Ohhh fuck yes! Fuck!"
His finger was sliding in and out as fast as his right hand was pumping his dick, and within minutes he was shooting another load over himself. He kept fingering his arsehole as he writhed around, riding the intense orgasm out, not wanting it to stop. His right hand moved to his chest, and started playing with his nipples. As he tweaked and twisted them, he thought they almost felt a little bigger, puffier than normal.
The new sensations of his arsehole and chest kept the first orgasming going right into another wave of bliss.
"Fuuuuuuck mmmmeeeoooo"
Lucas kept this up for another half an hour, unable to get himself to stop. Five loads of cum later and he managed to force himself to the bathroom. He was in desperate need of a shower.
He stopped first to look at himself in the mirror, and realised the changes weren't all in his head.
His hair, usually quite short, had grown out enough to cover his ears, with a fringe covering half his face when it flopped over the front. His face looked a little smaller too, with no sign of facial hair anywhere despite being stubbly earlier in the day. In fact, his whole frame looked a little smaller and girlier, but thicker in other areas. His hips had widened out more than earlier, and after turning sideways, his arse was definitely bigger. He felt shorter too.
But the area Lucas couldn't take his eyes off was his chest. His nipples HAD gotten bigger and puffier, and they now had a slight mound of flesh behind them too. Nothing significant, but enough for him to realise that he was definitely turning into a woman.
Even his dick, which was still at full attention, didn't look quite as 'full' as it did 4 hours ago, losing perhaps an inch in length. Lucas felt like he should be worried about the changes, but he wasn't. He'd spent most of the evening jizzing to the thought of being a woman, taking other men in his mouth, arse...pussy, and the thought of actually being able to do it was getting him all kinds of turned on again.
Lucas finally got in the shower, washing the day off before pleasuring himself again as the water washed over him. Once he was dried off, he got into bed, bringing himself to orgasm a few more times before finally passing out.